I Need A Relay

I still don't get it. Where is your aircon? If the front of it is in the tent, then the temperature sensor is in the tent. If it is outside, you could always just make the probe longer by splicing in a wire and put it in the tent. Hell of allot easier than fucking around with relays.

If your dead set on using your controller just by a remote triggered outlet like this....http://www.randmsupply.com/productdisp.php?pid=583&navid=5

My ac is in the window. I have 3 4x4 tents set up in the room. Using just the ac sensor limits me to a single temperature 24/7 with no adjustment between day and night.

You should have relays hooked up to all of your high amperage devises. Ghat way you take the load off the sentinal it only has to trip the relay.